Home / 8,688.63-13,035.38-3,420.39

Finding the Fourth Proportional to 8,688.63, 13,035.38 and 3,420.39

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Solution

The fourth proportional to 8,688.63, 13,035.38 and 3,420.39 is: 5,131.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.63 : 13,035.38 = 3,420.39 : x
  2. Step 2: Convert to fraction form
    8,688.63/13,035.38 = 3,420.39/x
  3. Step 3: Cross multiply
    8,688.63x = 13,035.38 × 3,420.39
  4. Step 4: Simplify right side
    8,688.63x = 44,586,083.40
  5. Step 5: Solve for x
    x = 44,586,083.40/8,688.63
  6. Step 6: Final answer
    x = 5,131.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.